| |
 |
| Paper: |
On the Mass and Evolutionary Status of the Bright Red AGB
Supergiant α1 Herculis |
| Volume: |
445, Why Galaxies Care about AGB Stars II: Shining Examples and Common Inhabitants |
| Page: |
163 |
| Authors: |
Moravveji, E.; Guinan, E. F.; Sobouti, Y. |
| Abstract: |
The mass of the bright M5 supergiant α1 Herculis has been
estimated in a number of studies to range over wide limits of 1.7 to
15 M☉.
Here, we address this wide range of mass assessments by constraining
the age, mass and nature of this
interesting variable star from three independent approaches:
(1) isochronal fitting of the three stars in the α Her multiple
star system, (2) extending asteroseismic mass and radius scaling to
semi-regular variable stars like α1 Her,
and (3) directly from assessments of log g and interferometric
radius measures. Our study indicates that α1 Her is an
intermediate-mass AGB star with a mass of ∼2.5 M☉ and
age of ∼1.2 Gyr. |
|
|
|
|
|
